目的：本文針對跆拳道品勢側踢質量分析，探討品勢側踢關鍵特徵與專業教練評分之相關性以及其重要程度排序，並以此跆拳道側踢動作關鍵特徵，提供教練及選手客觀之依據，將有助於跆拳道品勢技能足技動作競技水準之提升。方法：本研究以臺北市立龍山國民中學以及國立臺灣師範大學品勢運動員為研究對象，共計10人，透過錄製運動員之側踢影像，研擬品勢側踢關鍵計有七項特徵，並分析品勢運動員在其側踢過程中，與教練評分之相關性和重要程度排序，最終針對結果進行整理及系統性分析。結果：共探討七項品勢側踢關鍵特徵，分析其與專業教練評分之相關性，根據相關性關鍵特徵重要程度依序為夾膝時與軀幹之夾角、收腳過程的平均速度、踢擊最高點至開始收腳的時間、踢擊最高點之持續時間、夾膝完成至踢擊最高點的加速過程、支撐腳腳根與腳尖之夾角、收腳過程軀幹與支撐腳之夾角。結論：一、研究顯示側踢品質主要以夾膝時與軀幹之夾角判定，與動作評分呈現高度相關性。二、在側踢關鍵特徵中，表明(1)當踢擊最高點至開始收腳的時間越長(2)收腳過程中，軀幹與支撐腳之夾角越小(3)收腳過程的平均速度越快(4)夾膝時與軀幹之夾角越小，教練對於側踢表現之評分越高。

Purpose: This paper examines the quality of the Side Kick in Taekwondo and investigates the correlation between the key characteristics of the Side Kick and the professional coach’s rating, as well as the ranking of their importance. Providing coaches and players with an objective basis from our analysis will help to raise the level of Poomsae competition in foot techniques. Method: In this study, a total of 10 athletes from Taipei Longshan National High School and National Taiwan Normal University participated as the subjects. Using the videos of the athletes’ side kicks, we analyzed the importance of the judges’ ratings during the side kick stance and provided a reference for coaches and athletes in training or competition. Finally, the results were collected and systematically analyzed. Results: Seven key features of the Side Kick were analyzed, in descending order of importance, as follows: the angle between the bent knee and the torso, the average speed from the recovery process, the time between the highest point of the kick and the start of the leg retraction, the duration of the highest point of the kick, the acceleration between the completion of the knee clinch and the highest point of the kick, the angle between the heel and tiptoe of the supporting foot, and the angle between the torso and the supporting foot during the recovery process. Conclusion: 1. Research has shown that Taekwondo instructors mainly judge the quality of a Side Kick by the angle between the knee and the torso, which shows a high correlation with movement scores. 2. Among the seven key characteristics of the Side Kick, it shows that the following four characteristics will result in a higher score of the performance for the Side Kick: (1) the longer time between the highest point of the kick and the start of the recovery; (2) the smaller the angle between the torso and the supporting foot; (3) the faster the average speed of the recovery; and (4) the smaller the angle between the torso and the knee during the recovery.